/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.ekuma.android.ui.scan;

import cn.ekuma.android.ui.scan.camera.CameraManager;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import java.util.Collection;
import java.util.Map;

/**
 * This class handles all the messaging which comprises the state machine for capture.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class CaptureActivityHandler extends Handler {

	  private static final String TAG = CaptureActivityHandler.class.getSimpleName();

	  private final CaptureScanActivity activity;
	  private final DecodeThread decodeThread;
	  private State state;
	  private final CameraManager cameraManager;

	  private enum State {
	    PREVIEW,
	    SUCCESS,
	    DONE
	  }

	  CaptureActivityHandler(CaptureScanActivity activity,
	                         Collection<BarcodeFormat> decodeFormats,
	                         Map<DecodeHintType,?> baseHints,
	                         String characterSet,
	                         CameraManager cameraManager) {
	    this.activity = activity;
	    decodeThread = new DecodeThread(activity, decodeFormats, baseHints, characterSet,
	        new ViewfinderResultPointCallback(activity.getViewfinderView()));
	    decodeThread.start();
	    state = State.SUCCESS;

	    // Start ourselves capturing previews and decoding.
	    this.cameraManager = cameraManager;
	    cameraManager.startPreview();
	    restartPreviewAndDecode();
	  }

	  @Override
	  public void handleMessage(Message message) { 
	   
	      if( Intents.IDS.restart_preview==message.what){
	        Log.d(TAG, "Got restart preview message");
	        restartPreviewAndDecode();
	      }else if(Intents.IDS.decode_succeeded==message.what){
	      
	        Log.d(TAG, "Got decode succeeded message");
	        state = State.SUCCESS;
	        Bundle bundle = message.getData();
	        Bitmap barcode = null;
	        float scaleFactor = 1.0f;
	        //if (bundle != null) {
	        //  byte[] compressedBitmap = bundle.getByteArray(DecodeThread.BARCODE_BITMAP);
	        //  if (compressedBitmap != null) {
	        //    barcode = BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
	            // Mutable copy:
	       //     barcode = barcode.copy(Bitmap.Config.ARGB_8888, true);
	        //  }
	         // scaleFactor = bundle.getFloat(DecodeThread.BARCODE_SCALED_FACTOR);          
	       // }
	        activity.handleDecode((Result) message.obj, barcode, scaleFactor);
	      }else if(Intents.IDS.decode_failed==message.what){
	        // We're decoding as fast as possible, so when one decode fails, start another.
	        state = State.PREVIEW;
	        cameraManager.requestPreviewFrame(decodeThread.getHandler(), Intents.IDS.decode);
	      }else if( Intents.IDS.return_scan_result==message.what){
	        Log.d(TAG, "Got return scan result message");
	        activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
	        activity.finish();
	      }/*
	      case R.id.launch_product_query:
	        Log.d(TAG, "Got product query message");
	        String url = (String) message.obj;

	        Intent intent = new Intent(Intent.ACTION_VIEW);
	        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
	        intent.setData(Uri.parse(url));

	        ResolveInfo resolveInfo =
	            activity.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
	        String browserPackageName = null;
	        if (resolveInfo.activityInfo != null) {
	          browserPackageName = resolveInfo.activityInfo.packageName;
	          Log.d(TAG, "Using browser in package " + browserPackageName);
	        }

	        // Needed for default Android browser / Chrome only apparently
	        if ("com.android.browser".equals(browserPackageName) || "com.android.chrome".equals(browserPackageName)) {
	          intent.setPackage(browserPackageName);
	          intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	          intent.putExtra(Browser.EXTRA_APPLICATION_ID, browserPackageName);
	        }

	        try {
	          activity.startActivity(intent);
	        } catch (ActivityNotFoundException ignored) {
	          Log.w(TAG, "Can't find anything to handle VIEW of URI " + url);
	        }
	        break;
	    }*/
	  }

	  public void quitSynchronously() {
	    state = State.DONE;
	    cameraManager.stopPreview();
	    Message quit = Message.obtain(decodeThread.getHandler(), Intents.IDS.quit);
	    quit.sendToTarget();
	    try {
	      // Wait at most half a second; should be enough time, and onPause() will timeout quickly
	      decodeThread.join(500L);
	    } catch (InterruptedException e) {
	      // continue
	    }

	    // Be absolutely sure we don't send any queued up messages
	    removeMessages(Intents.IDS.decode_succeeded);
	    removeMessages(Intents.IDS.decode_failed);
	  }

	  private void restartPreviewAndDecode() {
	    if (state == State.SUCCESS) {
	      state = State.PREVIEW;
	      cameraManager.requestPreviewFrame(decodeThread.getHandler(), Intents.IDS.decode);
	      activity.drawViewfinder();
	    }
	  }

	}
